IC Timer Expert Help

Discussion in 'General Electronics Chat' started by dociledragons, Oct 6, 2013.

  1. dociledragons

    Thread Starter New Member

    Oct 6, 2013
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  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Depends how its configured, could be by disabling the set pin1,reset pin 2 or osc inhibit pin 14,
     
  3. dociledragons

    Thread Starter New Member

    Oct 6, 2013
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    Would it help if I took a pic? I disabled pin 1. Now I wait.
     
    Last edited: Oct 6, 2013
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    yes take piccys and post
     
  5. MrChips

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    Oct 2, 2009
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  6. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    I haven't studied the datasheet in depth, but would disabling any of those pins actually cause the IC to shut off? That's the opposite of what is wanted.

    Edit: Ok, after checking the sheet further it seems holding pin 1 high and pins 2,7,14 low will cause the output (pin 13) to stay high (=on).
     
    Last edited: Oct 6, 2013
  7. dociledragons

    Thread Starter New Member

    Oct 6, 2013
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    OK thanks for the reply everybody.

    Sadly, I shorted out the circuit. Ops... So, now I'm in need of curcuit that that can power the heating element safely.. Would it be as easy as a Potentiometer, a couple resistors, diode??? Except I have three wires coming out the heating pad. I can assume the third one is the thermometer.

    Any help would be appreciate. I no I could purchase a light dimmer but those are 10 plus bucks. If I were to do that I would just purchase another heating pad.

    Edit: I just need it on a "High" setting.
     
  8. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    It might not be safe to ignore the thermometer wire. The pad could overheat if powered uncontrolled. Depends on the design/spec (unknown).
     
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